Derivative Instruments - Impact of Derivative Instruments on the Consolidated Statements of Comprehensive Income (Details) - USD ($) $ in Thousands	3 Months Ended	6 Months Ended
Jun. 30, 2019	Jun. 30, 2018	Jun. 30, 2019	Jun. 30, 2018
Foreign Exchange Contract
Derivative [Line Items]
Gain (loss) on foreign exchange contracts and term loans designated as net investment hedge recognized in OCI	$ 100,407	$ 150,703	$ 12,725	$ 88,005
Designated as Hedging Instrument
Derivative [Line Items]
Gain (loss) on derivative instruments	7,134	4,091	12,467	3,822
Derivative Instruments Not Designated
Derivative [Line Items]
Gain (loss) on derivative instruments	$ (1,128)	$ 734	$ (2,666)	$ 2,453

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Aggregate net gain (loss) on all derivative instruments recognized in earnings during the period, before tax effects.

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-Publisher FASB
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Amount, after tax, of reclassification from accumulated other comprehensive income (AOCI) of gain (loss) from increase (decrease) in fair value of net investment hedge.

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Reference 1: http://www.xbrl.org/2003/role/disclosureRef
-Publisher FASB
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